PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus, Paid In	Retained Earnings	PSNH	PSNH Common Stock	PSNH Capital Surplus, Paid In	PSNH Retained Earnings
Beginning balance (in shares) at Dec. 31, 2024		366,608,052				301
Beginning balance at Dec. 31, 2024	$ 15,039,387	$ 1,878,622	$ 9,428,905	$ 3,929,141	$ 2,706,802	$ 0	$ 1,898,134	$ 808,668
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income					66,279			66,279
Dividends on Common Stock	(276,229)			(276,229)
Capital Contributions from Eversource Parent					75,000		75,000
Ending balance (in shares) at Mar. 31, 2025		367,307,083				301
Ending balance at Mar. 31, 2025	$ 15,341,257	$ 1,878,622	9,440,596	4,203,700	2,848,081	$ 0	1,973,134	874,947
Beginning balance (in shares) at Dec. 31, 2025	375,416,880	375,416,880				301
Beginning balance at Dec. 31, 2025	$ 16,197,271	$ 1,914,273	9,937,878	4,504,983	2,876,156	$ 0	1,973,134	903,022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income					79,777			79,777
Dividends on Common Stock	$ (295,978)			(295,978)	(38,900)			(38,900)
Ending balance (in shares) at Mar. 31, 2026	375,974,644	375,974,644				301
Ending balance at Mar. 31, 2026	$ 16,530,950	$ 1,914,273	$ 9,950,113	$ 4,815,846	$ 2,917,033	$ 0	$ 1,973,134	$ 943,899